//
// experimental/append.hpp
// ~~~~~~~~~~~~~~~~~~~~~~~
//
// Copyright (c) 2003-2022 Christopher M. Kohlhoff (chris at kohlhoff dot com)
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//

#ifndef ASIO_EXPERIMENTAL_APPEND_HPP
#define ASIO_EXPERIMENTAL_APPEND_HPP

#if defined(_MSC_VER) && (_MSC_VER >= 1200)
# pragma once
#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)

#include "asio/detail/config.hpp"
#include <tuple>
#include "asio/detail/type_traits.hpp"

#include "asio/detail/push_options.hpp"

namespace asio {
    namespace experimental {

/// Completion token type used to specify that the completion handler
/// arguments should be passed additional values after the results of the
/// operation.
        template<typename CompletionToken, typename... Values>
        class append_t {
        public:
            /// Constructor.
            template<typename T, typename... V>
            ASIO_CONSTEXPR explicit append_t(
                    ASIO_MOVE_ARG(T) completion_token,
                    ASIO_MOVE_ARG(V)...

            values)
            :

            token_ (ASIO_MOVE_CAST(T)(completion_token)),
            values_(ASIO_MOVE_CAST(V)(values)...) {
            }

//private:
            CompletionToken token_;
            std::tuple<Values...> values_;
        };

/// Completion token type used to specify that the completion handler
/// arguments should be passed additional values after the results of the
/// operation.
        template<typename CompletionToken, typename... Values>
        ASIO_NODISCARD inline ASIO_CONSTEXPR

        append_t<
                typename decay<CompletionToken>::type, typename decay<Values>::type...>
        append(ASIO_MOVE_ARG(CompletionToken) completion_token,
               ASIO_MOVE_ARG(Values)...

        values) {
        return

        append_t<
                typename decay<CompletionToken>::type, typename decay<Values>::type...>(
                ASIO_MOVE_CAST(CompletionToken)(completion_token),
                ASIO_MOVE_CAST(Values)(values)

        ...);
    }

} // namespace experimental
} // namespace asio

#include "asio/detail/pop_options.hpp"

#include "asio/experimental/impl/append.hpp"

#endif // ASIO_EXPERIMENTAL_APPEND_HPP
